Re-application of Fungicides for Pink and Gray Snow Mold

Cleveland, Ohio (January 3, 2007)--Poor snow cover and cool-moist conditions are perfect for the development of pink snow mold, pathogen Microdochium nivale. The pathogen survives in thatch as mycelia and spores. The mycelia are salmon- pink in color. When under conditions of prolonged absence of snow, or if the treated area is subjected to flooding and heavy rainfall, or if disease is severe or reappears during mild winter conditions, the turf area should be treated again with 8 fl. oz./ 1000 ft 2 of Revere 400 or 5 lbs./1000 ft2 of Revere 10G .

For spring applications, combining Revere with other fungicides such as LESCO’s 18 Plus, T-Storm, LESCO Bayleton, MANhandle, Manicure, Spectator, Spectator Ultra and Touche is recommended and has proven to be effective.

All plant parts are susceptible during cool, wet periods (1). Microdochium Patch or pink snow mold infection is favored by 32F-50F temperatures requires no snow cover and can be very active through rainy, foggy conditions (2,1).

Gray snow mold or Typhula Blight caused by the pathogen Typhula incarnata or Typhula ishikariensis is more of a problem under prolonged periods of snow cover. The disease develops with temperatures just above freezing. Gray snow mold is much less of a problem when under little to no snow cover (1).

For more information about using LESCO fungicides contact your local LESCO representative or the LESCO Technical Services team at 800-321-5325 ext.6150.

Literature Cited

1. McBeath, J.H. 2002, Snowmold-PlantAntagonist Interactions: Survival of the Fittest under the Snow. APSnet.

2. Latin, R. Turfgrass Disease Profiles, BP-125-W,Purdue University Extension.